Double-tube brush: both rigid and flexible, easy to use. Suitable for writing small and medium-sized regular script, meticulous portrait, retouching photography and industrial plate making.
Purple brush: flexible and round, suitable for small and medium-sized regular script and industrial drawings.
Langhao: vigorous and powerful, suitable for painting and calligraphy, suitable for splashing ink on mountains and rivers, freehand brushwork on flowers, and also suitable for writing all kinds of calligraphy.